I have a Hayward SWG with a T-15 cell and it keeps reading low salt and the readings are dropping daily. I first noticed this a few months ago when the readings dropped from 3000 to 2700. Then overthe course of a week it went from 2700 to 900, I cleaned the cell first and nothing changed. I also added salt(2 40lb bags) and recalibrated my swg and it went to 1400 but the next morning it was down to 700. I then replaced the board and the cell and still getting low readings.I have since added more salt(3 40lb bags) and the readings havent changed. I did a test with my test kit and my salt reading is now at 4800 but it currently reads 2000 as of this morning and yesterday morning it read 2500. I'm lost on where to go from here on what else could be causing this problem.
For info purposes I have a small pool only 7800 gallons.